AWM Investment Company, Inc. - 04 Mar 2025 Form 3 Insider Report for 908 Devices Inc. (MASS)

Role: 10%+ Owner
Signature: Adam Stettner
Issuer symbol: MASS
Transactions as of: 04 Mar 2025
Net transactions value: $0
Form type: 3
Filing time: 14 Mar 2025, 16:27:06 UTC
Previous filing: 06 Mar 2025
Next filing: 09 May 2025
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	MASS	Common Stock						5,199,924	04 Mar 2025	By Limited Partnerships	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	AWM Investment Company, Inc., a Delaware Corporation (AWM), is the investment adviser to Special Situations Fund III QP, L.P. (SSFQP), Special Situations Cayman Fund, L.P. (CAY), Special Situations Private Equity Fund, L.P. (SSPE), Special Situations Technology Fund, L.P. (TECH) and Special Situations Technology Fund II, L.P. (TECH II and together with SSFQP, CAY, SSPE and TECH, the Funds). As the investment adviser to the Funds, AWM holds sole voting and investment power over 2,235,354 shares of Common Stock of the Issuer (the Shares) held by SSFQP, 649,110 Shares held by CAY, 300,000 Shares held by SSPE, 338,137 Shares held by TECH and 1,677,323 Shares held by TECH II.
F2	David M. Greenhouse (Greenhouse) and Adam C. Stettner (Stettner) are the controlling principals of AWM. The reporting person disclaims beneficial ownership of the Shares, except to the extent of its pecuniary interest therein. This report shall not be deemed an admission that the reporting person is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

Content

AWM Investment Company, Inc., a Delaware Corporation (AWM), is the investment adviser to Special Situations Fund III QP, L.P. (SSFQP), Special Situations Cayman Fund, L.P. (CAY), Special Situations Private Equity Fund, L.P. (SSPE), Special Situations Technology Fund, L.P. (TECH) and Special Situations Technology Fund II, L.P. (TECH II and together with SSFQP, CAY, SSPE and TECH, the Funds). As the investment adviser to the Funds, AWM holds sole voting and investment power over 2,235,354 shares of Common Stock of the Issuer (the Shares) held by SSFQP, 649,110 Shares held by CAY, 300,000 Shares held by SSPE, 338,137 Shares held by TECH and 1,677,323 Shares held by TECH II.

David M. Greenhouse (Greenhouse) and Adam C. Stettner (Stettner) are the controlling principals of AWM. The reporting person disclaims beneficial ownership of the Shares, except to the extent of its pecuniary interest therein. This report shall not be deemed an admission that the reporting person is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.